<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item><a href="/">权限管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 添加角色按钮 -->

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRolesDialog">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0? 'bdtop':'', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)"> {{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级权限 -->
              <el-col :span="19">
                <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="editRolesDialog(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>

      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色的对话框 -->
    <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible" width="50%">
      <el-form ref="form" :model="addRoleForm" label-width="80px">
        <el-form-item label="角色名称">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色的对话框 -->
    <el-dialog title="提示" :visible.sync="editRolesDialogVisible" width="50%">
      <el-form ref="form" :model="editRoleForm" label-width="80px">
        <el-form-item label="角色名称">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoles(editRoleForm.roleId)">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>
<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      roleList: [],
      //   控制分配权限的对话框显示与隐藏
      setRightDialogVisible: false,
      //   所有权限的数据
      rightslist: [],
      //   树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //   默认选中的节点id值数组
      defKeys: [],
      //   当前即将分配权限的角色id
      roleId: '',
      //   控制添加角色对话框的显示隐藏
      addRoleDialogVisible: false,
      //   添加角色表单信息
      addRoleForm: {
        roleName: '',
        roleDesc: ''
      },
      //   控制编辑角色对话框的显示隐藏
      editRolesDialogVisible: false,
      editRoleForm: {}
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    //   获取所有角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败!')
      this.roleList = res.data
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('取消了删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除失败!')
      role.children = res.data
      this.$message.success('删除成功')
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限失败!')
      this.rightslist = res.data

      //    获取三级节点id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    //    通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('分配权限失败!')
      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
    // 添加角色弹出对话框
    addRolesDialog () {
      this.addRoleDialogVisible = true
    },
    // 添加角色
    async addRoles () {
      const { data: res } = await this.$http.post('roles', { roleName: this.addRoleForm.roleName, roleDesc: this.addRoleForm.roleDesc })
      if (res.meta.status !== 201) return this.$message.error('添加角色失败!')
      this.addRoleDialogVisible = false
      this.$message.success('添加角色成功!')
      this.addRoleForm = {}
    },
    // 点击编辑弹出编辑角色对话框
    async editRolesDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('获取角色信息失败!')
      this.editRoleForm = res.data
      this.editRolesDialogVisible = true
    },
    // 修改角色信息
    async editRoles (id) {
      const { data: res } = await this.$http.put('roles/' + id, { roleName: this.editRoleForm.roleName, roleDesc: this.editRoleForm.roleDesc })
      if (res.meta.status !== 200) return this.$message.error('修改角色信息失败!')
      this.getRolesList()
      this.editRolesDialogVisible = false
      this.$message.success('修改角色信息成功!')
    },
    // 根据id删除对应的角色信息
    async removeRolesById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败!')
      this.getRolesList()
      this.$message.success('删除角色成功!')
    }
  }

}
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
